path: root/contrib/epee/include/reg_exp_definer.h

// Copyright (c) 2014, The Monero Project
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
// 
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
// 
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
// 
// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 
// Parts of this file are originally copyright (c) 2006-2013, Andrey N. Sabelnikov

#ifndef _REG_EXP_DEFINER_H_
#define _REG_EXP_DEFINER_H_

#include <boost/interprocess/detail/atomic.hpp>


namespace epee
{
  class global_regexp_critical_section
  {
  private:
    mutable critical_section regexp_lock;
  public:
    global_regexp_critical_section(){}
    critical_section& get_lock()const {return regexp_lock;}
  };

  const static global_regexp_critical_section gregexplock;

#define STATIC_REGEXP_EXPR_1(var_name, xpr_text, reg_exp_flags) \
	static volatile uint32_t regexp_initialized_1 = 0;\
	volatile uint32_t local_is_initialized_1 = regexp_initialized_1;\
	if(!local_is_initialized_1)\
	gregexplock.get_lock().lock();\
	static const boost::regex	var_name(xpr_text , reg_exp_flags);\
	if(!local_is_initialized_1)\
{\
	boost::interprocess::ipcdetail::atomic_write32(&regexp_initialized_1, 1);\
	gregexplock.get_lock().unlock();\
}

#define STATIC_REGEXP_EXPR_2(var_name, xpr_text, reg_exp_flags) \
	static volatile uint32_t regexp_initialized_2 = 0;\
	volatile uint32_t local_is_initialized_2 = regexp_initialized_2;\
	if(!local_is_initialized_2)\
	gregexplock.get_lock().lock().lock();\
	static const boost::regex	var_name(xpr_text , reg_exp_flags);\
	if(!local_is_initialized_2)\
{\
	boost::interprocess::ipcdetail::atomic_write32(&regexp_initialized_2, 1);\
	gregexplock.get_lock().lock().unlock();\
}

#define STATIC_REGEXP_EXPR_3(var_name, xpr_text, reg_exp_flags) \
	static volatile uint32_t regexp_initialized_3 = 0;\
	volatile uint32_t local_is_initialized_3 = regexp_initialized_3;\
	if(!local_is_initialized_3)\
	gregexplock.get_lock().lock().lock();\
	static const boost::regex	var_name(xpr_text , reg_exp_flags);\
	if(!local_is_initialized_3)\
{\
	boost::interprocess::ipcdetail::atomic_write32(&regexp_initialized_3, 1);\
	gregexplock.get_lock().lock().unlock();\
}
}

#endif //_REG_EXP_DEFINER_H_